JP3485540B2 - Low noise transformer - Google Patents
Low noise transformerInfo
- Publication number
- JP3485540B2 JP3485540B2 JP2000401447A JP2000401447A JP3485540B2 JP 3485540 B2 JP3485540 B2 JP 3485540B2 JP 2000401447 A JP2000401447 A JP 2000401447A JP 2000401447 A JP2000401447 A JP 2000401447A JP 3485540 B2 JP3485540 B2 JP 3485540B2
- Authority
- JP
- Japan
- Prior art keywords
- noise
- transformer
- layer
- vibration
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 241000282376 Panthera tigris Species 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 55
- 238000000034 method Methods 0.000 description 17
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 230000005381 magnetic domain Effects 0.000 description 6
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 239000003190 viscoelastic substance Substances 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000576 Laminated steel Inorganic materials 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229920002367 Polyisobutene Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229910018619 Si-Fe Inorganic materials 0.000 description 1
- 229910008289 Si—Fe Inorganic materials 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はトランスなどの鉄心
に用いられ、振動発生が少ない低騒音トランス用電磁鋼
板および低騒音トランスに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic steel sheet for a low noise transformer and a low noise transformer, which are used for an iron core of a transformer or the like and generate little vibration.
【０００２】[0002]
【従来の技術】電気・電子機器に幅広く使用される磁性
材料において、磁界印加時の長さ変化の度合い（これを
磁気ひずみと呼ぶ）は変圧器騒音の原因となるため、品
質管理における重要な評価項目の一つとなっている。近
年、電気機器からの騒音は、生活環境快適化の要求と共
にさらに規制が厳しくなりつつある。このため、磁気ひ
ずみの低減による低騒音化の研究が盛んに行われてい
る。2. Description of the Related Art In magnetic materials widely used in electric and electronic devices, the degree of change in length when a magnetic field is applied (this is called magnetostriction) causes transformer noise, which is an important factor in quality control. It is one of the evaluation items. In recent years, noise from electric devices has become more severely regulated along with the demand for comfortable living environment. For this reason, research into noise reduction by reducing magnetostriction is being actively conducted.
【０００３】磁性材料のうち、トランスの鉄心に用いら
れる一方向性電磁鋼板については、還流磁区を減少させ
ることで磁気ひずみを低減する手法がある。ここで言う
還流磁区とは、磁界印加方向に対して直角に向いている
磁化を有する領域である。この磁化が印加磁界により磁
界と平行方向に向けて動くときに磁気ひずみが生じる。
従って、還流磁区量が少ないほど磁気ひずみは小さくな
る。主な磁気ひずみ低減の手法として、以下のものが知
られている。Among the magnetic materials, for the unidirectional electrical steel sheet used for the iron core of the transformer, there is a method of reducing the magnetic strain by reducing the return magnetic domain. The reflux magnetic domain referred to here is a region having a magnetization that is oriented at right angles to the magnetic field application direction. Magnetostriction occurs when this magnetization moves in a direction parallel to the magnetic field by the applied magnetic field.
Therefore, the smaller the return magnetic domain amount, the smaller the magnetostriction. The followings are known as main methods for reducing magnetostriction.
【０００４】結晶粒の＜００１＞方向を圧延方向に揃
え、磁化回転により形状変化を生じさせる還流磁区を作
らない方法（T.Nozawa et al, “Relationship Between
Total Losses under Tensile Stress in 3 Percent Si
-Fe Single Crystals and Their Orientations near (1
10)[001], ”IEEE Trans. on Mag., Vol. MAG-14, No.
4,1978.）、
塑性歪を開放することで還流磁区を消去する方法（特
開平７−３０５１１５号公報、［画記的な方向性珪素鋼
板オリエントコア・ハイビーの開発］：ＯＨＭ1972.
2）、
被膜張力を鋼板に印加することで還流磁区を消去する
方法(T.Nozawa et al,“Relationship between Total L
osses under Tensile Stress in 3 Percent Si-Fe Sing
le Crystals and Their Orientations near (110)[00
1], ”IEEE Trans. on Mag., Vol. MAG-14, No.4,197
8.) 。A method in which the <001> direction of crystal grains is aligned with the rolling direction and a reflux magnetic domain that causes a shape change due to magnetization rotation is not formed (T. Nozawa et al, "Relationship Between").
Total Losses under Tensile Stress in 3 Percent Si
-Fe Single Crystals and Their Orientations near (1
10) [001], ”IEEE Trans. On Mag., Vol. MAG-14, No.
4,1978.), A method of eliminating the reflux magnetic domain by releasing the plastic strain (Japanese Patent Laid-Open No. 7-305115, [Development of Oriented Silicon Steel Sheet Orient Core High Bee]]: OHM1972.
2) Method of eliminating the reflux magnetic domain by applying film tension to the steel sheet (T. Nozawa et al, “Relationship between Total L
osses under Tensile Stress in 3 Percent Si-Fe Sing
le Crystals and Their Orientations near (110) [00
1], ”IEEE Trans. On Mag., Vol. MAG-14, No.4,197
8.).
【０００５】一方、磁気ひずみの低減のみではなく、発
生する振動を抑える方式で騒音の低減が図れる。発生す
る振動を抑える方式で騒音を低減する方法として、例え
ば、振動の伝播を切るためエア空間やシリコンゴムを設
ける方法（特開平５−２５１２４６号公報）、制振材と
吸音材を鉄心脚の外部に配置して騒音を低減する方法
（特開平８−４５７５１、特開２０００−８２６２２、
特開２０００−１２４０４４号公報）、リアクトルのギ
ャップ部を振動が抑えられる接着材で固定する方法（特
開平８−１１１３２２号公報）、樹脂中間層をもつ電磁
鋼板を用いる方法（特開平８−２５０３３９号公報）が
ある。主にこれらの手法により、磁気ひずみ、あるいは
振動を低減し電気機器の低騒音化が図られてきた。On the other hand, not only the reduction of magnetostriction but also the reduction of noise can be achieved by the method of suppressing the generated vibration. As a method of suppressing noise by a method of suppressing generated vibration, for example, a method of providing an air space or silicon rubber to cut off the propagation of vibration (Japanese Patent Laid-Open No. 5-251246), a damping material and a sound absorbing material of an iron core leg are used. A method for reducing noise by arranging it externally (Japanese Patent Laid-Open No. 8-45751, Japanese Patent Laid-Open No. 2000-82622,
Japanese Patent Laid-Open No. 2000-124044), a method of fixing the gap portion of the reactor with an adhesive that suppresses vibration (Japanese Patent Laid-Open No. 8-111322), and a method of using an electromagnetic steel sheet having a resin intermediate layer (Japanese Patent Laid-Open No. 8-250339). Issue gazette). These methods have mainly been used to reduce magnetostriction or vibration to reduce the noise of electrical equipment.
【０００６】[0006]
【発明が解決しようとする課題】電気機器のさらなる低
騒音化への要求は強く、目的を達するためには高度な技
術が必要となる。従来の低騒音化の研究は還流磁区の消
滅による磁気ひずみの低減を主な目的としてきた。とこ
ろが、時間的に変化する磁界を加えると、トランスの鉄
心として組んだ場合、鋼板の伸縮は鋼板が必ずしも平坦
ではないため鋼板面に垂直な振動に変化する。この振動
によって空気の疎密波が生じ音となって広がる。今まで
この振動を低減するため鋼板の磁気ひずみを小さくする
ように上述した結晶方位の先鋭化、塑性歪の開放、張力
の印加等、従来技術として確立されている。ほかに外部
に振動を伝播させない防振構造を設ける対策がある。し
かしながら、さらなる低騒音化への要求に対処するため
には、空気粒子の振動原因となる鋼板面振動を抑えるこ
とが課題となる。There is a strong demand for further noise reduction of electric equipment, and advanced technology is required to achieve the purpose. Conventional research on noise reduction has mainly aimed at reduction of magnetostriction due to disappearance of reflux domains. However, when a time-varying magnetic field is applied, when assembled as an iron core of a transformer, the expansion and contraction of the steel plate changes to vibration perpendicular to the steel plate surface because the steel plate is not necessarily flat. Due to this vibration, a compression wave of air is generated and spreads as a sound. Until now, in order to reduce this vibration, it has been established as a conventional technique to sharpen the crystal orientation, release the plastic strain, apply tension, etc. so as to reduce the magnetic strain of the steel sheet. Another measure is to install a vibration-proof structure that does not transmit vibration to the outside. However, in order to meet the demand for further noise reduction, it is an issue to suppress the steel plate surface vibration that causes the vibration of air particles.
【０００７】このような課題に対して樹脂中間層をもつ
電磁鋼板で構成した鉄心が既に提案されているが、積層
鋼板間の２層おきに樹脂中間層が入るため占積率が低
く、鉄心断面積を大きくする必要性がある。本発明の課
題は、鋼板面に垂直な振動を抑える条件を見出し、低騒
音化を効果的に実現する、振動発生が少ない低騒音トラ
ンス用電磁鋼板および低騒音トランスを提供することに
ある。To solve such problems, an iron core made of an electromagnetic steel sheet having a resin intermediate layer has already been proposed. However, since the resin intermediate layer is inserted every two layers between laminated steel sheets, the space factor is low and the iron core is It is necessary to increase the cross-sectional area. An object of the present invention is to provide a magnetic steel sheet for a low-noise transformer and a low-noise transformer that finds a condition for suppressing vibration perpendicular to the steel plate surface and effectively realizes noise reduction, and that produces less vibration.
【０００８】[0008]
【課題を解決するための手段】本発明の要旨とするとこ
ろは以下の通りである。
（１） 電磁鋼板をｎ枚積層して構成されたトランス鉄
心において、ｎ−１個の積層間のうち、下記の式を満足
するｍ個の積層間に厚さが３０μｍ以上の粘弾性体層を
具備したことを特徴とする低騒音トランス。３≦（ｎ−１）／ｍ≦３０
（２） 損失係数が２０〜２００℃の範囲のいずれかの
温度において１つ以上のピークを持つ粘弾性体の層を鋼
板面の少なくとも片面に３０μｍ以上の厚さで有する電
磁鋼板を用いたトランス鉄心において、粘弾性体層がラ
ンダムに配設されていることを特徴とする低騒音トラン
ス。The gist of the present invention is as follows. (1) A transformer iron made by stacking n magnetic steel sheets
In mind, satisfy the following formula among n-1 stacks
A viscoelastic layer having a thickness of 30 μm or more is provided between the m laminated layers.
A low noise transformer characterized by being equipped . 3 ≦ (n−1) / m ≦ 30 (2) A loss-coefficient layer of viscoelastic material having one or more peaks at any temperature in the range of 20 to 200 ° C. is made of steel.
Electrodes with a thickness of 30 μm or more on at least one side of the plate surface
In a transformer core using magnetic steel sheets, the viscoelastic body layer is
Low noise tran
Su .
【０００９】[0009]
【発明の実施の形態】すでに述べたように現在までの主
な方法は磁気ひずみを小さくし、面振動を低減させてい
た。また、外部に振動を伝播させない防振構造をとって
いた。しかしながら本発明者らは、トランスの鉄心にお
いて鋼板の積層間に粘性と弾性を併せ持つ粘弾性体層を
挿入する方法において、鋼板の面振動を小さくし、騒音
を低減することを効果的に実現するため鋭意研究を行っ
た。以下、実験にもとづき説明する。BEST MODE FOR CARRYING OUT THE INVENTION As described above, the main methods to date have been to reduce magnetostriction and reduce surface vibration. In addition, it has a vibration-proof structure that does not propagate vibration to the outside. However, in the method of inserting a viscoelastic body layer having both viscosity and elasticity between laminated steel sheets in the iron core of a transformer, the present inventors effectively realize the reduction of surface vibration of the steel sheet and the reduction of noise. Therefore, I conducted a diligent research. The following is a description based on experiments.
【００１０】３００×１８０×１０mmの小型トランスを
造り（図１）、騒音を測定した（図２）。２枚の電磁鋼
板の間に厚さ２０μｍの粘弾性体層を挟んだ複層電磁鋼
板を用いた鉄心（全粘弾性層厚０．４２mm）と４層に１
層の割合で規則的に同じ積層順にならないように３０μ
ｍ厚の粘弾性体層を変則的に入れた鉄心（全粘弾性層厚
０．３０mm）を用いて騒音を比較した。本実験の結果、
全粘弾性層厚が薄いにもかかわらず、４層に１層の割合
で変則的に粘弾性体層を挿入した鉄心において騒音は低
かった。A small transformer of 300 × 180 × 10 mm was manufactured (FIG. 1) and noise was measured (FIG. 2). An iron core (total viscoelastic layer thickness 0.42 mm) using a multilayer electromagnetic steel sheet in which a viscoelastic body layer having a thickness of 20 μm is sandwiched between two electromagnetic steel sheets and one in four layers
30μ so that the layers do not have the same stacking order
Noise was compared using an iron core (total viscoelastic layer thickness 0.30 mm) in which an m-thick viscoelastic layer was irregularly inserted. As a result of this experiment,
Although the total viscoelastic layer thickness was thin, the noise was low in the iron core in which the viscoelastic layer was irregularly inserted at a ratio of one in four layers.
【００１１】本効果の定かな理由は明らかではないが、
発明者らは粘弾性体層の厚さが振動吸収に効果があり、
薄い粘弾性体層を鉄心内に多く分散した場合より有効に
なるものと考えている。また、鉄心の共振周波数は材質
が同じであれば重量から決まるが、等しい層間隔で粘弾
性体層を入れると、等しい重量の鋼板ブロックに分割さ
れるため、各ブロックで共振周波数が一致し振動が共振
により増幅する。一方、粘弾性体層の層間隔を変則的
（ランダム）にした場合では共振周波数が分散するので
特定の周波数で大きな振動が発生し難くなったと考えて
いる。Although the exact reason for this effect is not clear,
The inventors have found that the thickness of the viscoelastic body layer is effective in absorbing vibration,
It is considered to be more effective than the case where many thin viscoelastic layers are dispersed in the iron core. Also, the resonance frequency of the iron core is determined by the weight if the material is the same, but if the viscoelastic layer is inserted at equal intervals, it will be divided into steel plate blocks of equal weight, so the resonance frequency will be the same in each block Is amplified by resonance. On the other hand, when the viscoelastic layer spacing is irregular (random), the resonance frequency is dispersed, and it is considered that large vibrations are hard to occur at a specific frequency.
【００１２】図３にはこれらの方法の占積率を示した。
従来法である粘弾性体層を多く内部に分散した鉄心で
は、層厚が２０μｍにもかかわらず、粘弾性体の層数が
多くなるため本発明の積層鉄心より占積率は低い。本発
明では、粘弾性体層が厚いので振動の吸収が大きく、騒
音の低減だけでなく、占積率も高く出来る。FIG. 3 shows the space factor of these methods.
In the iron core having a large number of viscoelastic material layers dispersed therein, which is a conventional method, the space factor is lower than that of the laminated iron core of the present invention because the viscoelastic material has a large number of layers although the layer thickness is 20 μm. In the present invention, since the viscoelastic body layer is thick, the absorption of vibration is large, and not only the noise can be reduced but also the space factor can be increased.
【００１３】以上の観点から本発明者らは、従来技術と
しての磁気ひずみのみを小さくするだけでは騒音低減は
不完全で、さらに面振動を抑えることも重要であると考
えた。面振動を抑制する条件は鋼板間に粘弾性体をラン
ダムに挿入することで満足され、このような電磁鋼板を
提供することで、効果的にトランス等の電気機器騒音を
低減できることを見出し、本発明に至ったのである。From the above viewpoints, the present inventors considered that noise reduction is incomplete by reducing only magnetostriction as in the prior art, and it is also important to suppress surface vibration. The condition for suppressing surface vibration is satisfied by randomly inserting a viscoelastic body between steel plates, and it has been found that by providing such an electromagnetic steel plate, it is possible to effectively reduce the noise of electrical equipment such as a transformer. It was the invention.
【００１４】次に、本発明の限定条件について説明す
る。粘弾性体の厚さは厚い程効果が大きい。特公平７−
８５４５７号公報に記載されている方法では、６．５％
Ｓｉの積層鉄心に含浸剤を入れることで振動を抑制す
る。積層鋼板の表面粗度Ｒｍａｘが３．５μｍ以上と規
定されているが、コアをかしめた後に真空含浸するた
め、含浸剤の厚さは高々１０μｍ程度と考えられる。本
発明では振動抑制効果を大きくするため、少なくとも３
０μｍ以上、好ましくは４０〜６０μｍの厚さの粘弾性
体を用いている。Next, the limiting conditions of the present invention will be described. The thicker the viscoelastic body, the greater the effect. Tokuhei 7-
In the method described in Japanese Patent No. 85457, 6.5%
Vibration is suppressed by adding an impregnating agent to the laminated core of Si. The surface roughness Rmax of the laminated steel sheet is specified to be 3.5 μm or more, but since the core is caulked and then vacuum impregnated, the thickness of the impregnating agent is considered to be at most about 10 μm. In the present invention, in order to increase the vibration suppressing effect, at least 3
A viscoelastic body having a thickness of 0 μm or more, preferably 40 to 60 μm is used.
【００１５】一般のトランス鉄心は、動作時に２０〜２
００℃の温度域にあるため粘弾性体の損失係数のピーク
がこの温度範囲にあることが好ましい。この範囲のどの
温度で損失係数をピークにするかは、その応用環境によ
って決定すればよい。尚、ポリイソブチレンは損失係数
のピークが０℃にあり、ポリエステルは１００℃、ニト
リルゴムは２０℃にあることが既に知られている。A general transformer iron core is 20 to 2 in operation.
Since it is in the temperature range of 00 ° C., the peak of the loss coefficient of the viscoelastic body is preferably in this temperature range. The temperature in this range at which the loss coefficient peaks may be determined by the application environment. It is already known that polyisobutylene has a loss coefficient peak at 0 ° C, polyester has 100 ° C, and nitrile rubber has 20 ° C.
【００１６】また、本鉄心において３層に１層以上の割
合で粘弾性体層を入れると占積率が著しく低下するため
（ｎ−１）／ｍを３以上にした。しかしながら、３０層
に１層の割合で粘弾性体を挿入すると振動の吸収が弱い
ので、（ｎ−１）／ｍを３０以下にした。粘弾性体層を
鋼板に等しい層間隔で入れず、変則的（ランダム）な積
み方にする理由は、共振周波数を分散させ、共振による
振動の増幅を避けるためである。Further, when the viscoelastic material layer is added to the three layers in the present iron core at a ratio of one or more, the space factor remarkably decreases, so (n-1) / m is set to 3 or more. However, when the viscoelastic body is inserted in a ratio of 1 layer to 30 layers, vibration absorption is weak, so (n-1) / m was set to 30 or less. The reason why the viscoelastic material layers are not arranged at equal intervals in the steel sheet and are arranged irregularly (randomly) is to disperse the resonance frequency and avoid amplification of vibration due to resonance.
【００１７】[0017]
【実施例】［実施例１］常法により製造した、板厚０．
２３mmの一方向性電磁鋼板を用い、何も挿入しないも
の：Ａ、ポリエステル系樹脂を１０層に１層の割合で等
しい層間隔にならないように挿入したもの：Ｂ、オレフ
ィン系フィルム樹脂を１０層に１層の割合で等しい層間
隔にならないよう挿入したもの：Ｃ、ポリイソブチレン
樹脂を全層に挿入したもの：Ｄをそれぞれ積層鉄心と
し、それぞれ５００ｋＶＡの３相トランスに組み立て、
５０Hz１．６Ｔで励磁した場合の騒音を測定した。尚、
樹脂層の厚さはＤが２０μｍ、他は５０μｍとし、トラ
ンス積層厚は５０mmとした。その結果を表１に示す。本
発明の条件を満たす鉄心から製作したトランス鉄心Ｂ、
Ｃでは、騒音を低くすることができた。[Example] [Example 1] A plate thickness of 0.
Using 23 mm unidirectional electrical steel sheet, nothing inserted: A, polyester resin inserted in 10 layers so as not to have equal layer spacing in 1 layer: B, 10 layers of olefin film resin In order to prevent equal spacing between layers, C: polyisobutylene resin is inserted in all layers: D is a laminated core, and each is assembled into a 500 kVA three-phase transformer.
The noise when excited at 50 Hz 1.6 T was measured. still,
The resin layer had a thickness D of 20 μm, the other had a thickness of 50 μm, and the transformer laminated thickness was 50 mm. The results are shown in Table 1. A transformer core B manufactured from an iron core satisfying the conditions of the present invention,
In C, the noise could be reduced.
【００１８】[0018]
【表１】 [Table 1]
【００１９】［実施例２］常法により製造した、板厚
０．２７mmの一方向性電磁鋼板を用い、何も挿入しない
もの：Ｅ、オレフィン系フィルム樹脂を１０層毎に１層
挿入したもの：Ｆ、２０層毎に１層挿入したもの：Ｇ、
３０層毎に１層挿入したもの：Ｈ、４０層毎に１層挿入
したもの：Ｉをそれぞれ積層鉄心とし、５００ｋＶＡの
３相トランスに組み立て、５０Hz１．４Ｔで励磁した場
合の騒音を測定した。樹脂層の厚さは５０μｍとし、ト
ランス積層厚は５０mmに積んだ。その結果を表２に示
す。２０層毎に１層挿入したものが最小の騒音を示し
た。上記のように、本発明の条件を満たす材料から製作
したトランス鉄心Ｆ、Ｇ、Ｈでは、騒音を低くすること
ができた。[Example 2] A unidirectional electrical steel sheet having a plate thickness of 0.27 mm manufactured by a conventional method and having nothing inserted therein: E, one layer of olefin film resin being inserted every 10 layers : F, one inserted every 20 layers: G,
One layer was inserted every 30 layers: H, and one layer was inserted every 40 layers: I was used as a laminated iron core, assembled into a three-phase transformer of 500 kVA, and the noise when excited at 50 Hz 1.4 T was measured. The resin layer had a thickness of 50 μm, and the transformer laminated thickness was 50 mm. The results are shown in Table 2. The noise was minimum when one layer was inserted every 20 layers. As described above, the transformer cores F, G, and H manufactured from the material satisfying the conditions of the present invention can reduce the noise.
【００２０】[0020]
【表２】 [Table 2]
【００２１】［実施例３］常法により製造した、板厚
０．２７mmの一方向性電磁鋼板を用い、何も挿入しない
もの：Ｊ、オレフィン系フィルム樹脂を１０層毎に１層
挿入したもの：Ｋ、樹脂の挿入枚数をＪと同じにし、鉄
心中心部に集中して３層毎に１層挿入したもの：Ｌ、同
じ枚数で鉄心表層部に集中して３層毎に１層挿入したも
の：Ｍをそれぞれ積層鉄心とし、５００ｋＶＡの３相ト
ランスに組み立て、５０Hz１．４Ｔで励磁した状態にお
ける騒音を測定した。樹脂層の厚さは５０μｍとし、ト
ランス積層厚は５０mmに積んだ。その結果を表３に示
す。上記のように、本発明の条件を満たす材料から製作
したトランス鉄心Ｋ、Ｌでは、騒音を低くすることがで
きた。[Embodiment 3] A unidirectional electrical steel sheet having a thickness of 0.27 mm produced by a conventional method and having nothing inserted therein: J, one in which 10 layers of olefin film resin are inserted. : K, the number of resin insertions is the same as J, and one layer is inserted every 3 layers by concentrating in the center of the core: L, 1 layer is inserted every 3 layers by concentrating in the surface layer of the core with the same number. No .: M was a laminated core, assembled into a three-phase transformer of 500 kVA, and the noise was measured in the state of being excited at 50 Hz 1.4 T. The resin layer had a thickness of 50 μm, and the transformer laminated thickness was 50 mm. The results are shown in Table 3. As described above, the noise can be reduced in the transformer cores K and L manufactured from the materials satisfying the conditions of the present invention.
【００２２】[0022]
【表３】 [Table 3]
【００２３】[0023]
【発明の効果】以上説明したように、本発明によれば鋼
板面に垂直な振動を抑え、低騒音化を効果的に実現す
る、振動発生が少ない低騒音トランス用電磁鋼板および
トランスを提供でき、電気機器の低騒音化が図られるの
で、産業上の利益は極めて大きい。As described above, according to the present invention, it is possible to provide an electromagnetic steel sheet for a low noise transformer and a transformer that suppresses vibrations perpendicular to the steel sheet surface and effectively realizes low noise. Since the noise of electric equipment can be reduced, the industrial benefit is extremely large.
【図１】騒音を測定したトランスの寸法である。FIG. 1 is a transformer dimension for measuring noise.
【図２】トランス騒音に与える粘弾性層の効果を示した
ものである。FIG. 2 shows the effect of a viscoelastic layer on transformer noise.
【図３】電磁鋼板の占積率を示したものである。FIG. 3 shows a space factor of an electromagnetic steel sheet.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 溝上 雅人 千葉県富津市新富20−１ 新日本製鐵株 式会社 技術開発本部内 (72)発明者 籔本 政男 千葉県富津市新富20−１ 新日本製鐵株 式会社 技術開発本部内 (72)発明者 秋末 治 千葉県富津市新富20−１ 新日本製鐵株 式会社 技術開発本部内 (56)参考文献 実開 平２−120805（ＪＰ，Ｕ) 実開 平３−20142（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 27/33 H01F 27/245 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masato Mizoue 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Co., Ltd. Technology Development Division (72) Inventor Masao Utsumoto 20-1 Shintomi, Futtsu City, Chiba Prefecture Shinnihon (72) Inventor, Osamu Akisue 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Co., Ltd. Corporate Technology Development Headquarters (56) Bibliography 2-120805 (JP, U ) Actual Kaihei 3-20142 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H01F 27/33 H01F 27/245
Claims (2)
ンス鉄心において、ｎ−１個の積層間のうち、下記の式
を満足するｍ個の積層間に厚さが３０μｍ以上の粘弾性
体層を具備したことを特徴とする低騒音トランス。３≦（ｎ−１）／ｍ≦３０ 1. A tiger constituted by laminating n magnetic steel sheets.
In the iron core, the following formula is used among n-1 laminated layers.
Viscoelasticity with a thickness of 30 μm or more between m laminated layers satisfying
A low-noise transformer having a body layer . 3 ≦ (n−1) / m ≦ 30
れかの温度において１つ以上のピークを持つ粘弾性体の
層を鋼板面の少なくとも片面に３０μｍ以上の厚さで有
する電磁鋼板を用いたトランス鉄心において、粘弾性体
層がランダムに配設されていることを特徴とする低騒音
トランス。2. A loss factor of the viscoelastic body having one or more peaks in any temperature range of 20 to 200 ° C.
A layer having a thickness of 30 μm or more on at least one side of the steel plate
A viscoelastic body in a transformer core using electromagnetic steel sheets
Low noise, characterized by randomly arranged layers
Trance .
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000401447A JP3485540B2 (en) | 2000-12-28 | 2000-12-28 | Low noise transformer |
| EP01130603.2A EP1220243B2 (en) | 2000-12-28 | 2001-12-21 | Electrical steel sheet for low-noise transformer and low-noise transformer |
| DE60141321T DE60141321D1 (en) | 2000-12-28 | 2001-12-21 | Low-noise transformer |
| US10/034,061 US20020140537A1 (en) | 2000-12-28 | 2001-12-27 | Electrical steel sheet for low-noise transformer and low-noise transformer |
| US10/808,925 US7456724B2 (en) | 2000-12-28 | 2004-03-25 | Electrical steel sheet for low-noise transformer and low-noise transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000401447A JP3485540B2 (en) | 2000-12-28 | 2000-12-28 | Low noise transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002203728A JP2002203728A (en) | 2002-07-19 |
| JP3485540B2 true JP3485540B2 (en) | 2004-01-13 |
Family
ID=18865875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000401447A Expired - Fee Related JP3485540B2 (en) | 2000-12-28 | 2000-12-28 | Low noise transformer |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US20020140537A1 (en) |
| EP (1) | EP1220243B2 (en) |
| JP (1) | JP3485540B2 (en) |
| DE (1) | DE60141321D1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110076096A1 (en) | 2009-09-25 | 2011-03-31 | Saint-Gobain Performance Plastics Rencol Limited | System, method and apparatus for tolerance ring control of slip interface sliding forces |
| DE102013013376A1 (en) * | 2013-08-10 | 2015-02-12 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Stator laminated core for an electric motor |
| KR102177038B1 (en) | 2014-11-14 | 2020-11-10 | 주식회사 포스코 | Insulation coating composite for oriented electrical steel steet, oriented electrical steel steet formed insulation coating film on using the same insulation coating composite, and method of manufacturing the same oriented electrical steel steet |
| EP3724967A1 (en) | 2017-12-15 | 2020-10-21 | Saint-Gobain Performance Plastics Rencol Limited | Annular member, method, and assembly for component displacement control |
| DE102018204876A1 (en) * | 2018-03-29 | 2019-10-02 | Thyssenkrupp Ag | Electric motor with a slanted stator and / or rotor containing at least one layer of a composite material |
| KR102441170B1 (en) * | 2020-10-06 | 2022-09-06 | 한일전원공업주식회사 | Noise reducing high-frequency transformer |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2223494C3 (en) † | 1972-05-13 | 1974-12-19 | Transformatoren Union Ag, 7000 Stuttgart | Laminated iron core for transformers |
| DE2225177C3 (en) † | 1972-05-24 | 1978-04-27 | Transformatoren Union Ag, 7000 Stuttgart | Laminated iron core for transformers |
| DE2308892C3 (en) † | 1973-02-23 | 1978-06-22 | Transformatoren Union Ag, 7000 Stuttgart | Laminated transformer core for power transformers |
| US3994845A (en) † | 1974-08-26 | 1976-11-30 | H. L. Blachford Limited | Vibration damping sheet |
| GB1535198A (en) † | 1974-12-25 | 1978-12-13 | Nippon Steel Corp | Vibration damping steel sheet |
| JPS621879A (en) * | 1985-06-28 | 1987-01-07 | Nippon Kokan Kk <Nkk> | High-damping composite steel sheet and its production |
| JPH0673935B2 (en) * | 1988-04-01 | 1994-09-21 | ニチアス株式会社 | Damping material and soundproof structure using damping material |
| US5188698A (en) * | 1989-01-23 | 1993-02-23 | Nippon Steel Corporation | Resin-sandwiched metal laminate, process and apparatus for producing the same and process for the producing resin film for the resin-sandwiched metal laminate |
| US5143790A (en) * | 1989-08-09 | 1992-09-01 | Westinghouse Electric Corp. | Integrally-damped steel composite laminated structure and method of attaching same |
| DE3939492A1 (en) * | 1989-11-29 | 1991-06-06 | Mack Chem Pharm | PHARMACEUTICAL PREPARATIONS |
| DE69110273T2 (en) | 1991-04-26 | 1996-01-25 | Ibm | Coaxial vibration damping arrangement of a toroidal transformer. |
| JPH0785457A (en) | 1993-09-13 | 1995-03-31 | Sony Corp | Magnetic recording medium |
| JPH07305115A (en) | 1994-05-06 | 1995-11-21 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet excellent in core loss and magnetostrictive property |
| JPH0845751A (en) | 1994-07-27 | 1996-02-16 | Meidensha Corp | Low-noise transformer |
| JP3255211B2 (en) | 1994-10-07 | 2002-02-12 | 日本鋼管株式会社 | Core for low noise transformer and reactor |
| JPH08250339A (en) * | 1995-03-10 | 1996-09-27 | Nippon Steel Corp | Low-noise grain-oriented electromagnetic steel plate and laminated core |
| GB2331852A (en) † | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer winding arrangements |
| GB2331857A (en) † | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Magnetic core assemblies |
| US6191510B1 (en) * | 1997-12-19 | 2001-02-20 | 3M Innovative Properties Company | Internally damped stator, rotor, and transformer and a method of making |
| JP2000082622A (en) | 1998-09-07 | 2000-03-21 | Fuji Electric Co Ltd | Low noise transformer |
| JP2000124044A (en) | 1998-10-14 | 2000-04-28 | Hitachi Ltd | Low-noise transformer |
| JP4366783B2 (en) | 1998-11-16 | 2009-11-18 | 株式会社デンソー | Multilayer battery and method of manufacturing electrode thereof |
-
2000
- 2000-12-28 JP JP2000401447A patent/JP3485540B2/en not_active Expired - Fee Related
-
2001
- 2001-12-21 DE DE60141321T patent/DE60141321D1/en not_active Expired - Lifetime
- 2001-12-21 EP EP01130603.2A patent/EP1220243B2/en not_active Expired - Lifetime
- 2001-12-27 US US10/034,061 patent/US20020140537A1/en not_active Abandoned
-
2004
- 2004-03-25 US US10/808,925 patent/US7456724B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US20040178872A1 (en) | 2004-09-16 |
| US7456724B2 (en) | 2008-11-25 |
| US20020140537A1 (en) | 2002-10-03 |
| DE60141321D1 (en) | 2010-04-01 |
| EP1220243B1 (en) | 2010-02-17 |
| EP1220243A3 (en) | 2003-03-05 |
| EP1220243A2 (en) | 2002-07-03 |
| JP2002203728A (en) | 2002-07-19 |
| EP1220243B2 (en) | 2014-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3485540B2 (en) | Low noise transformer | |
| JP4092791B2 (en) | Low loss and low noise iron core and manufacturing method thereof | |
| JP3243099B2 (en) | Manufacturing method of laminated electromagnetic steel sheet | |
| JP2017084889A (en) | Low noise winding transformer and manufacturing method of the same | |
| JP3255211B2 (en) | Core for low noise transformer and reactor | |
| JP3500103B2 (en) | Unidirectional electrical steel sheet for transformers | |
| CN110326068B (en) | Transformer core | |
| JP4473476B2 (en) | Manufacturing method of core for low noise winding transformer | |
| JP3869768B2 (en) | Transformer | |
| JPS59130409A (en) | Laminated core | |
| JP3408885B2 (en) | Low-noise grain-oriented electrical steel sheets and laminated cores | |
| EP1160340B1 (en) | Grain-oriented electrical steel sheet for low-noise transformer | |
| JP4585101B2 (en) | Low noise transformer electrical steel sheet | |
| JP3418644B2 (en) | Transformer core | |
| JPS6022308A (en) | Magnetic iron core | |
| JPH08250339A (en) | Low-noise grain-oriented electromagnetic steel plate and laminated core | |
| JP2003163121A (en) | Low noise transformer and reactor | |
| JP4276618B2 (en) | Low iron loss unidirectional electrical steel sheet | |
| JP3823418B2 (en) | Core with gap for reactor | |
| JPH09186023A (en) | Low noise transformer iron core | |
| JPS6024345A (en) | Grain-oriented silicon steel sheet | |
| JPH04250604A (en) | Transformer core | |
| JPH0777171B2 (en) | Composite core | |
| CN117052819A (en) | Transformer efficient vibration isolator based on local resonance principle | |
| JP2784386B2 (en) | Magnetic multilayer film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20030930 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 3485540 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071024 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081024 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091024 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101024 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101024 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121024 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121024 Year of fee payment: 9 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 10 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 10 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 10 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |